[Bug runtime/14175] New: ensure aggregates are no slower than locked integer ops

[fche at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=14175

             Bug #: 14175
           Summary: ensure aggregates are no slower than locked integer
                    ops
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: runtime
        AssignedTo: systemtap@sourceware.org
        ReportedBy: fche@redhat.com
    Classification: Unclassified


There has been a microbenchmark report that our aggregates' <<< 1 type
operations take longer than similar integer ++, even including locking
overheads, with the speculation that this is because the runtime always tracks
sums/max/min/count even if only one is needed by the script.

It would be helpful to reproduce the report [1], and if it is confirmed
non-trivial, to fix the runtime not to do unnecessary work.

[1]
https://github.com/fche/ServerUsage/commit/ff889cdcbaef65e2ce26a30ad4d18a614d6f41a2

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